Down payment vs CLP: Investor ke liye kya smarter hai?

Visited Aashi Construction Infra in Sector 140A last weekend. I work in real estate, but buying for myself feels totally different, honestly. They're pushing construction-linked plans, but I'm trying to figure out if a higher down payment can actually get a better overall deal. Say, for a 3BHK around ₹85L. Matlab, total acquisition cost pe kya farak padega? As an investor, is it smarter to pay more upfront for a spot discount, ya CLP mein interest save kar sakte hain? Builders sometimes adjust PLC or even OC for lump sum payments. Kya Greater Noida mein yeh strategy work karti hai, especially for investor deals? What's the real total cost when you factor in everything? Share your hacks please.